I live migrate a vm using
--live --copy-storage-all mig-vm qemu+ssh://192.168.1.3/system
got the following error
WARNING: Image format was not specified for
'nbd://node2:49155/drive-virtio-disk0' and probing
Automatically detecting the format is dangerous for raw
images, write operations on block 0 will be restricted.
the 'raw' format explicitly to remove the restrictions.
the error itself, I can tell that nbd server treat this image
as raw, rather than qcow2. My platform is libvirt+qemu. the
image type of this vm is indeed qcow2. I do not know how to
let nbd know this image format.